Seifert, B., & Schultz, R. 2021: A taxonomic revision of the Palaearctic ant subgenus Coptoformica Müller, 1923 (Hymenoptera, Formicidae): With 40 figures and 7 tables and an electronic supplementary information SI1, SI2, SI3 - Beiträge Zur Entomologie = Contributions to Entomology 71(2): 177–220 - doi: 10.21248/contrib.entomol.71.2.177-220